Notepad++ takes ~10 seconds to load on my Windows 7 dev machine...
Loads under 400ms on mine. Not sure why Atom takes so long.
Looks like it is profiling it's own startup:
Packages->timecop->show
Doesn't show useful info. Window load time is 1809ms, workspace load time 94ms, everything else is under 20ms. I hate being nitpicker, but thats a lot of time to load window.
Not yet, they promised to work on performance after proper Windows support though.